FUNDUS - The urban geography of inequalities: Budapest summer edition¶
The FUNDUS project of Urbanum Lab (a tech lab empowered by the interdisciplinary Urbanum Research Foundation), as its very title suggests, aims at laying the foundations for a globally applicable, open and accessible approach (including technological as well as methodological contributions) for the assessment of how economical factors of living (especially, real estate prices) are correlated with the quality of life in a certain urban environment, as captured by environmental and other social indicators.
In this notebook, the Budapest summer edition, we will be focusing on a simple, yet central question with manifold interpretations and consequences: do higher (average) real estate prices indicate a greener environment, less prone to the heat island phenomenon? (In simpler words: does more expensive mean greener and cooler in the summer?)
Outline¶
In this notebook, we are using Budapest as an example, and part of our data comes from our own scraper solution to obtain average property prices from real estate offers on the internet.
In particular, the notebook is structured as follows:
- We present technical details on the data being used
- we summarize the technical takeaways provided,
- ...
How to reproduce our results¶
This notebook presents the first, exploratory data analysis phase of our project. We would like to get a glimpse
into the data and its possible use. First, you have to run the property price scraper. You can find more info on
getting the property prices data in the repository of the project. We assume that you have a WEkEO account, if this is not
the case, please register here. It is a good practice to install all the project
requirements using a separated Python 3.9.10 (or higher) virtual environment. Use requirements.txt to install all dependencies. Last, you have
to configure your .hdarc file using your WEkEO credentials. This article shows you how to do this.
If you would like to adapt our notebook to a different municipality or for a different time horizon, use WEkEO's online data exploratory tool.
You might find useful the BoundingBox tool to get latitude and longitude coordinates of a given area.
Data used¶
WEkEO datasets¶
Dataset queries were generated by using the WEkEO online platform.
The queries can be fund in the data/jsons folder
- Global 10-daily Leaf Area Index 333m
{ "datasetId": "EO:CLMS:DAT:CGLS_GLOBAL_LAI300_V1_333M", "dateRangeSelectValues": [ { "name": "dtrange", "start": "2022-06-01T00:00:00.000Z", "end": "2022-06-30T23:59:59.999Z" } ] }
- Level 2 Land - Sea and Land Surface
Temperature Radiometer (SLSTR) - Sentinel-3
{ "datasetId": "EO:ESA:DAT:SENTINEL-3:SL_2_LST___", "boundingBoxValues": [ { "name": "bbox", "bbox": [ 18.99804053609134, 47.42120186691113, 19.190237776905892, 47.58048586099437 ] } ], "dateRangeSelectValues": [ { "name": "position", "start": "2022-06-01T00:00:00.000Z", "end": "2022-06-30T00:00:00.000Z" } ], "stringChoiceValues": [ { "name": "productType", "value": "LST" }, { "name": "timeliness", "value": "Near+Real+Time" }, { "name": "orbitDirection", "value": "ascending" }, { "name": "processingLevel", "value": "LEVEL2" } ] }
- Global 10-daily Fraction of Vegetation Cover 333m
{ "datasetId": "EO:CLMS:DAT:CGLS_GLOBAL_FCOVER300_V1_333M", "dateRangeSelectValues": [ { "name": "dtrange", "start": "2022-06-01T00:00:00.000Z", "end": "2022-06-30T23:59:59.999Z" } ] }
External dataset¶
- The square meter prices dataset was collected on 12th July 2022 using our freely available scraper. The data is in the
data/aggragatedfolder. WARNING: Check the README.md file of the scraper to get your own data. - The POIs data was downloaded from OpenStreetMap using the pyrosm package. For more details see this repo
- Thanks to Járókelő - a platform for street maintenance and for communication between citizens and local administrations - we got data on various issues reported by volunteers. For more on this, see this repos
Technical takeaways¶
The notebook provides a novel methodology for exploratory data analysis in the field of urban digital geography, instantiated using a limited, yet appropriate example (Budapest, Hungary in the summer). At the end of this notebook, you will know:
- How to aggregate data using the h3 library,
- how to visualize the data using the pydeck package, and
- how to investigate spatial discrepancies along property prices and environmental factors
Data acquisition¶
Library imports¶
Here, we import packages for the project.
!pip install h3 altair pydeck xarray hda
import json
import os
from functools import reduce
import h3
import altair as at
import numpy as np
import pandas as pd
import pydeck as pdk
import xarray as xr
from hda import Client
c = Client(debug=True)
with open("../data/jsons/temperature.json") as infile:
query = json.load(infile)
matches = c.search(query)
# matches.download()
LAI¶
c = Client(debug=True)
with open("../data/jsons/lai.json") as infile:
query = json.load(infile)
matches = c.search(query)
# matches.download()
FCOVER¶
c = Client(debug=True)
with open("../data/jsons/fcover.json") as infile:
query = json.load(infile)
matches = c.search(query)
# matches.download()
Your operating system and tools might be different, below you can read tips which might be useful on a Linux machine
- The notebook assumes that all data is in the
datafolder. - Move all zip and nc files
to the folder (e.g. you can use the
mvcommand, likemv ../data "*.zip") - Make folders for the data fiels (
cd data; mkdir leaf_data temp_data fcover) - Move the *.nc files to the corresponding folders (e.g. move Leaf Area Index data into
leaf_data) - Move the .zip files into the
temp_datafolder `cd temp_data; unzip ".zip"; rm "*.zip"`
Cleaning and transforming data¶
Property square meter prices¶
We scraped a Hungarian real estate listing site to get property prices in Budapest. The listing entries
were geocoded using the geocoder package. The geo-coordinates were indexed using the H3 hexagonal
geospatial indexing system. You can check the resolution table of the cell
areas here. For more details, you can check
the repository of the scraper.
The data looks like this:
df5 = pd.read_csv("../data/aggregated/l5.tsv", sep="\t")
df6 = pd.read_csv("../data/aggregated/l6.tsv", sep="\t")
df7 = pd.read_csv("../data/aggregated/l7.tsv", sep="\t")
df8 = pd.read_csv("../data/aggregated/l8.tsv", sep="\t")
df7.head()
The hexagons listed in these files constitues our area of interest.
Temperature data¶
The code below aggregates the average temperature data on various levels of H3 hashing and writes the results to a tsv file.
h3_l5 = set(df5["l5"])
h3_l6 = set(df6["l6"])
h3_l7 = set(df7["l7"])
h3_l8 = set(df8["l8"])
root_folder = "../data/temp_data"
dirs = [
os.path.join(root_folder, d)
for d in os.listdir(root_folder)
if os.path.isdir(os.path.join(root_folder, d))
]
def is_within_bounding_box(lat, long):
if 47.392134 < lat < 47.601216 and 18.936234 < long < 19.250031:
return True
else:
return False
latlong_temp = {}
for inpath in dirs:
# geodetic_tx.nc -> latitude_tx, longitude_tx
geodetic = xr.open_dataset(
filename_or_obj=os.path.join(inpath, "geodetic_tx.nc"), engine="netcdf4"
)
lat = geodetic.data_vars["latitude_tx"].to_numpy().flatten()
long = geodetic.data_vars["longitude_tx"].to_numpy().flatten()
# met_tx.nc -> temperature_tx
met_tx = xr.open_dataset(
filename_or_obj=os.path.join(inpath, "met_tx.nc"), engine="netcdf4"
)
temp = met_tx.data_vars["temperature_tx"].to_numpy().flatten()
# LST_ancillary_ds.nc -> NDVI (empyt :()
lst = xr.open_dataset(
filename_or_obj=os.path.join(inpath, "LST_ancillary_ds.nc"), engine="netcdf4"
)
ndvi = lst.data_vars["NDVI"].to_numpy().flatten()
temp_data = zip(lat, long, temp)
temp_data = (e for e in temp_data if is_within_bounding_box(e[0], e[1]))
for e in temp_data:
k = (e[0], e[1])
if latlong_temp.get(k, False):
latlong_temp[k] = (latlong_temp[k] + e[2]) / 2
else:
latlong_temp[k] = e[2]
with open("../data/temp_budapest.tsv", "w") as outfile:
h = "lat\tlong\tcelsius\tl5\tl6\tl7\tl8\n"
outfile.write(h)
for k, v in latlong_temp.items():
l5 = h3.geo_to_h3(k[0], k[1], 5)
l6 = h3.geo_to_h3(k[0], k[1], 6)
l7 = h3.geo_to_h3(k[0], k[1], 7)
l8 = h3.geo_to_h3(k[0], k[1], 8)
if l5 in h3_l5 and l6 in h3_l6 and l7 in h3_l7 and l8 in h3_l8:
o = (
str(k[0])
+ "\t"
+ str(k[1])
+ "\t"
+ str(v - 273.15)
+ "\t"
+ l5
+ "\t"
+ l6
+ "\t"
+ l7
+ "\t"
+ l8
+ "\n"
)
outfile.write(o)
Global 10-daily Leaf Area Index 333m¶
The code below computes the average LAI and assigns H3 hash codes to the values. The results will be saved into a tsv file.
root_folder = "../data/leaf_data"
fs = [
os.path.join(root_folder, f)
for f in os.listdir(root_folder)
if os.path.isfile(os.path.join(root_folder, f))
]
ll2lai = {}
for f in fs:
try:
ds = xr.open_dataset(filename_or_obj=os.path.join(f), engine="netcdf4")
lat = ds.data_vars["LAI"]["lat"].to_numpy()
lat = [e for e in lat if 47.392134 < e < 47.601216]
lon = ds.data_vars["LAI"]["lon"].to_numpy()
lon = [e for e in lon if 18.936234 < e < 19.250031]
time = ds.data_vars["LAI"]["time"].to_numpy()[0]
for i in range(len(lat)):
for j in range(len(lon)):
one_point = ds["LAI"].sel(lat=lat[i], lon=lon[i])
vals = one_point.values[0]
if ll2lai.get((lat[i], lon[j]), False):
ll2lai[(lat[i], lon[j])] = (ll2lai[(lat[i], lon[j])] + vals) / 2.0
else:
ll2lai[(lat[i], lon[j])] = vals
except Exception as exc1:
print(exc1)
continue
with open("../data/lai_budapest.tsv", "w") as outfile:
h = "lat\tlong\tlai\tl5\tl6\tl7\tl8\n"
outfile.write(h)
for k, v in ll2lai.items():
h5 = h3.geo_to_h3(k[0], k[1], 5)
h6 = h3.geo_to_h3(k[0], k[1], 6)
h7 = h3.geo_to_h3(k[0], k[1], 7)
h8 = h3.geo_to_h3(k[0], k[1], 8)
if h5 in h3_l5 and h6 in h3_l6 and h7 in h3_l7 and h8 in h3_l8:
o = (
str(k[0])
+ "\t"
+ str(k[1])
+ "\t"
+ str(v)
+ "\t"
+ str(h5)
+ "\t"
+ str(h6)
+ "\t"
+ str(h7)
+ "\t"
+ str(h8)
+ "\n"
)
outfile.write(o)
Global 10-daily Fraction of Vegetation Cover 333m¶
The code below computes the average FCOVER and assigns H3 hash codes to the values. The results will be saved into a tsv file.
root_folder = "../data/fcover"
fs = [
os.path.join(root_folder, f)
for f in os.listdir(root_folder)
if os.path.isfile(os.path.join(root_folder, f))
]
def is_within_bounding_box(lat, long):
if 47.392134 < lat < 47.601216 and 18.936234 < long < 19.250031:
return True
else:
return False
ll2fcover = {}
for f in fs:
try:
ds = xr.open_dataset(filename_or_obj=os.path.join(f), engine="netcdf4")
lat = ds.data_vars["FCOVER"]["lat"].to_numpy()
lat = [e for e in lat if 47.392134 < e < 47.601216]
lon = ds.data_vars["FCOVER"]["lon"].to_numpy()
lon = [e for e in lon if 18.936234 < e < 19.250031]
time = ds.data_vars["FCOVER"]["time"].to_numpy()[0]
for i in range(len(lat)):
for j in range(len(lon)):
one_point = ds["FCOVER"].sel(lat=lat[i], lon=lon[i])
vals = one_point.values[0]
if ll2fcover.get((lat[i], lon[j]), False):
ll2fcover[(lat[i], lon[j])] = (
ll2fcover[(lat[i], lon[j])] + vals
) / 2.0
else:
ll2fcover[(lat[i], lon[j])] = vals
except Exception as exc1:
print(exc1)
continue
with open("../data/fcover_budapest.tsv", "w") as outfile:
h = "lat\tlong\tfcover\tl5\tl6\tl7\tl8\n"
outfile.write(h)
for k, v in ll2fcover.items():
h5 = h3.geo_to_h3(k[0], k[1], 5)
h6 = h3.geo_to_h3(k[0], k[1], 6)
h7 = h3.geo_to_h3(k[0], k[1], 7)
h8 = h3.geo_to_h3(k[0], k[1], 8)
if h5 in h3_l5 and h6 in h3_l6 and h7 in h3_l7 and h8 in h3_l8:
o = (
str(k[0])
+ "\t"
+ str(k[1])
+ "\t"
+ str(v)
+ "\t"
+ str(h5)
+ "\t"
+ str(h6)
+ "\t"
+ str(h7)
+ "\t"
+ str(h8)
+ "\n"
)
outfile.write(o)
df_price = pd.read_csv("../data/aggregated/l7.tsv", sep="\t")
df_price["normalized"] = 255 - (df_price["price"] / np.sqrt(np.sum(df_price["price"] ** 2)) * 1000)
layer = pdk.Layer(
"H3HexagonLayer",
df_price,
get_hexagon="l7",
auto_highlight=True,
# elevation_scale=10,
pickable=True,
# elevation_range=[min(df["price"]), max(df["price"])],
extruded=True,
coverage=0.8,
opacity=0.01,
get_fill_color="[255, normalized, 0]",
)
view_state = pdk.ViewState(
latitude=47.500000, longitude=19.040236, zoom=10.5, bearing=0, pitch=35
)
r = pdk.Deck(
layers=[layer],
initial_view_state=view_state,
tooltip={"text": "square meter price: {price}"},
)
r.to_html("../vizs/maps/prices_h7.html")
Temperature¶
df = pd.read_csv("../data/temp_budapest.tsv", sep="\t")
df.fillna(0, inplace=True)
df_temp = df.groupby("l7").mean()
df_temp.reset_index(inplace=True, level=["l7"])
df_temp["rescaled"] = [255 - ((e**3)/100) for e in df_temp["celsius"]]
layer = pdk.Layer(
"H3HexagonLayer",
df_temp,
get_hexagon="l7",
auto_highlight=True,
pickable=True,
extruded=True,
coverage=0.8,
opacity=0.05,
get_fill_color="[255, rescaled, 0]",
)
view_state = pdk.ViewState(
latitude=47.500000, longitude=19.040236, zoom=10.5, bearing=0, pitch=35
)
r = pdk.Deck(
layers=[layer],
initial_view_state=view_state,
tooltip={"text": "temperature (celsius): {celsius}"},
)
r.to_html("../vizs/maps/temperature_h7.html")
Leaf Area Index¶
df = pd.read_csv("../data/lai_budapest.tsv", sep="\t")
df.fillna(0, inplace=True)
df_lai = df.groupby("l7").mean()
df_lai.reset_index(inplace=True, level=["l7"])
layer = pdk.Layer(
"H3HexagonLayer",
df_lai,
get_hexagon="l7",
auto_highlight=True,
pickable=True,
extruded=True,
coverage=0.9,
opacity=0.05,
get_fill_color="[255, 255 - (lai * 100), 0]"
)
view_state = pdk.ViewState(
latitude=47.500000, longitude=19.040236, zoom=10.5, bearing=0, pitch=35
)
r = pdk.Deck(
layers=[layer],
initial_view_state=view_state,
tooltip={"text": "Leaf Area Index: {lai}"},
)
r.to_html("../vizs/maps/lai_h7.html")
Fraction of Vegetation Cover¶
df = pd.read_csv("../data/fcover_budapest.tsv", sep="\t")
df.fillna(0.0, inplace=True)
df_fcover = df.groupby("l7").mean()
df_fcover.reset_index(inplace=True, level=["l7"])
df_fcover["normalized"] = (df_fcover["fcover"] / np.sqrt(np.sum(df_fcover["fcover"] ** 5))) ** -2
df_fcover["normalized"][df_fcover["normalized"] == np.inf] = 255
layer = pdk.Layer(
"H3HexagonLayer",
df_fcover,
get_hexagon="l7",
auto_highlight=True,
pickable=True,
extruded=True,
coverage=0.8,
opacity=0.05,
get_fill_color="[255, normalized, 0]",
)
view_state = pdk.ViewState(
latitude=47.500000, longitude=19.040236, zoom=10.5, bearing=0, pitch=35
)
r = pdk.Deck(
layers=[layer],
initial_view_state=view_state,
tooltip={"text": "Fraction of Vegetation Cover: {fcover}"},
)
r.to_html("../vizs/maps/fcover_h7.html")
Analysis¶
We would like to test the common conception that wealthier neighborhoods are greener and also enjoy a lower average temperature during summer. Since we have no data on wealth at this granularity, we use property square meter prices as a proxy of wealth. This is a strong and yet not often assessed assumption. In particular, we test if
- temperature and greenness,
- temperature and square meter prices,
- greenness and square meter prices
are connected.
We present our findings as interactive visualizations. We start with a realtively fine H3 resolution (7), giving us a fairly tight covergae of the geographical are under investigation. However, as we notice that the geographical resolution might not match the resolution of economical data, we also experiment with lower H3 resolutions.
H3 level 7¶
at.renderers.enable('default')
data_frames = [df_price, df_temp, df_lai, df_fcover]
df_merged = reduce(lambda left,right: pd.merge(left,right,on=['l7'],
how='outer'), data_frames)
df_merged.dropna(inplace=True)
df_merged.drop(columns=["normalized_x", "lat_x", "long_x", "rescaled", "lat_y",
"long_y", "lat", "long", "normalized_y"], inplace=True)
df_merged.head()
cor_data = (df_merged.corr().stack().reset_index().rename(columns={0: 'correlation', 'level_0': 'variable', 'level_1': 'variable2'}))
cor_data['correlation_label'] = cor_data['correlation'].map('{:.2f}'.format) # Round to 2 decimal
cor_data
base = at.Chart(cor_data).encode(
x='variable2:O',
y='variable:O'
)
text = base.mark_text().encode(
text='correlation_label',
color=at.condition(
at.datum.correlation > 0.5,
at.value('white'),
at.value('black')
)
)
cor_plot = base.mark_rect().encode(
color='correlation:Q'
).properties(
width=700,
height=700
)
cor_plot + text
H3 level 6¶
Since our price data is collected on street name level, maybe we should use a lower resolution.
price_h3_df = pd.read_csv("../data/aggregated/l6.tsv", sep="\t")
temp_df = pd.read_csv("../data/temp_budapest.tsv", sep="\t")
lai_df = pd.read_csv("../data/lai_budapest.tsv", sep="\t")
fcover_df = pd.read_csv("../data/fcover_budapest.tsv", sep="\t")
temp_h3_df = temp_df.groupby("l6").mean()
temp_h3_df.reset_index(inplace=True, level=["l6"])
lai_h3_df = lai_df.groupby("l6").mean()
lai_h3_df.reset_index(inplace=True, level=["l6"])
fcover_h3_df = fcover_df.groupby("l6").mean()
fcover_h3_df.reset_index(inplace=True, level=["l6"])
h3_data_frames = [price_h3_df, temp_h3_df, lai_h3_df, fcover_h3_df]
df_merged_h3 = reduce(lambda left,right: pd.merge(left,right,on=['l6'],
how='outer'), h3_data_frames)
df_merged_h3.dropna(inplace=True)
df_merged_h3.drop(columns=["lat_x", "long_x", "lat_y", "long_y", "lat", "long"], inplace=True)
df_merged_h3.head()
cor_data_h3 = (df_merged_h3.corr().stack().reset_index().rename(
columns={0: 'correlation', 'level_0': 'variable', 'level_1': 'variable2'}))
cor_data_h3['correlation_label'] = cor_data_h3['correlation'].map('{:.2f}'.format)
cor_data_h3
base = at.Chart(cor_data_h3).encode(
x='variable2:O',
y='variable:O'
)
text = base.mark_text().encode(
text='correlation_label',
color=at.condition(
at.datum.correlation > 0.5,
at.value('white'),
at.value('black')
)
)
cor_plot = base.mark_rect().encode(
color='correlation:Q'
).properties(
width=700,
height=700
)
cor_plot + text
H3 Level 5¶
price_h3_df = pd.read_csv("../data/aggregated/l5.tsv", sep="\t")
temp_df = pd.read_csv("../data/temp_budapest.tsv", sep="\t")
lai_df = pd.read_csv("../data/lai_budapest.tsv", sep="\t")
fcover_df = pd.read_csv("../data/fcover_budapest.tsv", sep="\t")
temp_h3_df = temp_df.groupby("l5").mean()
temp_h3_df.reset_index(inplace=True, level=["l5"])
lai_h3_df = lai_df.groupby("l5").mean()
lai_h3_df.reset_index(inplace=True, level=["l5"])
fcover_h3_df = fcover_df.groupby("l5").mean()
fcover_h3_df.reset_index(inplace=True, level=["l5"])
h3_data_frames = [price_h3_df, temp_h3_df, lai_h3_df, fcover_h3_df]
df_merged_h3 = reduce(lambda left,right: pd.merge(left,right,on=['l5'],
how='outer'), h3_data_frames)
df_merged_h3.dropna(inplace=True)
df_merged_h3.drop(columns=["lat_x", "long_x", "lat_y", "long_y", "lat", "long"], inplace=True)
df_merged_h3.head()
cor_data_h3 = (df_merged_h3.corr().stack().reset_index().rename(
columns={0: 'correlation', 'level_0': 'variable', 'level_1': 'variable2'}))
cor_data_h3['correlation_label'] = cor_data_h3['correlation'].map('{:.2f}'.format)
cor_data_h3
base = at.Chart(cor_data_h3).encode(
x='variable2:O',
y='variable:O'
)
text = base.mark_text().encode(
text='correlation_label',
color=at.condition(
at.datum.correlation > 0.5,
at.value('white'),
at.value('black')
)
)
cor_plot = base.mark_rect().encode(
color='correlation:Q'
).properties(
width=700,
height=700
)
cor_plot + text
price_h3_df = pd.read_csv("../data/aggregated/l5.tsv", sep="\t")
temp_df = pd.read_csv("../data/temp_budapest.tsv", sep="\t")
lai_df = pd.read_csv("../data/lai_budapest.tsv", sep="\t")
fcover_df = pd.read_csv("../data/fcover_budapest.tsv", sep="\t")
temp_h3_df = temp_df.groupby("l5").mean()
temp_h3_df.reset_index(inplace=True, level=["l5"])
lai_h3_df = lai_df.groupby("l5").mean()
lai_h3_df.reset_index(inplace=True, level=["l5"])
fcover_h3_df = fcover_df.groupby("l5").mean()
fcover_h3_df.reset_index(inplace=True, level=["l5"])
osm_pois = pd.read_csv("../data/osm/key_l5.tsv", sep="\t")
osm_pois = osm_pois.pivot_table(values="0", index=osm_pois.l5, columns="key", aggfunc="first")
osm_pois.reset_index(inplace=True, level=["l5"])
osm_pois.fillna(0, inplace=True)
jarokelo = pd.read_csv("../data/jarokelo/jarokelo_l5.tsv", sep="\t")
jarokelo = jarokelo.pivot_table(values="0", index=jarokelo.l5, columns="Category", aggfunc="first")
jarokelo.reset_index(inplace=True, level=["l5"])
jarokelo.fillna(0, inplace=True)
h3_data_frames = [price_h3_df, temp_h3_df, lai_h3_df, fcover_h3_df, osm_pois, jarokelo]
df_merged_h3 = reduce(lambda left,right: pd.merge(left,right,on=['l5'],
how='outer'), h3_data_frames)
df_merged_h3.dropna(inplace=True)
df_merged_h3.drop(columns=["lat_x", "long_x", "lat_y", "long_y", "lat", "long"], inplace=True)
df_merged_h3.head()
cor_data_h3 = (df_merged_h3.corr().stack().reset_index().rename(
columns={0: 'correlation', 'level_0': 'variable', 'level_1': 'variable2'}))
cor_data_h3['correlation_label'] = cor_data_h3['correlation'].map('{:.2f}'.format)
cor_data_h3
base = at.Chart(cor_data_h3).encode(
x='variable2:O',
y='variable:O'
)
text = base.mark_text().encode(
text='correlation_label',
color=at.condition(
at.datum.correlation > 0.5,
at.value('white'),
at.value('black')
)
)
cor_plot = base.mark_rect().encode(
color='correlation:Q'
).properties(
width=700,
height=700
)
cor_plot + text
OSM main subfeatures and Jarokelo¶
price_h3_df = pd.read_csv("../data/aggregated/l5.tsv", sep="\t")
temp_df = pd.read_csv("../data/temp_budapest.tsv", sep="\t")
lai_df = pd.read_csv("../data/lai_budapest.tsv", sep="\t")
fcover_df = pd.read_csv("../data/fcover_budapest.tsv", sep="\t")
temp_h3_df = temp_df.groupby("l5").mean()
temp_h3_df.reset_index(inplace=True, level=["l5"])
lai_h3_df = lai_df.groupby("l5").mean()
lai_h3_df.reset_index(inplace=True, level=["l5"])
fcover_h3_df = fcover_df.groupby("l5").mean()
fcover_h3_df.reset_index(inplace=True, level=["l5"])
osm_pois = pd.read_csv("../data/osm/value_l5.tsv", sep="\t")
osm_pois = osm_pois.pivot_table(values="0", index=osm_pois.l5, columns="value", aggfunc="first")
osm_pois.reset_index(inplace=True, level=["l5"])
osm_pois.fillna(0, inplace=True)
jarokelo = pd.read_csv("../data/jarokelo/jarokelo_l5.tsv", sep="\t")
jarokelo = jarokelo.pivot_table(values="0", index=jarokelo.l5, columns="Category", aggfunc="first")
jarokelo.reset_index(inplace=True, level=["l5"])
jarokelo.fillna(0, inplace=True)
h3_data_frames = [price_h3_df, temp_h3_df, lai_h3_df, fcover_h3_df, osm_pois, jarokelo]
df_merged_h3 = reduce(lambda left,right: pd.merge(left,right,on=['l5'],
how='outer'), h3_data_frames)
df_merged_h3.dropna(inplace=True)
df_merged_h3.drop(columns=["lat_x", "long_x", "lat_y", "long_y", "lat", "long"], inplace=True)
df_merged_h3.head()
cor_data_h3 = (df_merged_h3.corr().stack().reset_index().rename(
columns={0: 'correlation', 'level_0': 'variable', 'level_1': 'variable2'}))
cor_data_h3['correlation_label'] = cor_data_h3['correlation'].map('{:.2f}'.format)
cor_data_h3
from altair import pipe, limit_rows, to_values
t = lambda data: pipe(data, limit_rows(max_rows=50000), to_values)
at.data_transformers.register('custom', t)
at.data_transformers.enable('custom')
base = at.Chart(cor_data_h3).encode(
x='variable2:O',
y='variable:O'
)
text = base.mark_text().encode(
text='correlation_label',
color=at.condition(
at.datum.correlation > 0.5,
at.value('white'),
at.value('black')
)
)
cor_plot = base.mark_rect().encode(
color='correlation:Q'
).properties(
width=10000,
height=10000
)
cor_plot + text
Discussion and conclusion¶
Here, we checked if there is a connection between property prices and environmental factors. In particular, we wanted to see if having a more expensive property in Budapest, Hungary correlates with a greener environment and a cooler summer. We used WEkEO data to get information on the environment and we scraped property prices to supplement the data. Interestingly, using lower (but still not too coarse) geographical resolutions provided us with some notable (even if not very surprising) correlations between more expensive properties and the greenness of its environment (using both the LAI and the FCOVER measure for greenness. However, we could not verify any significant direct connection between higher prices and more acceptable temperature conditions! This might be a first step towards an important future investigation: if consequences of climate change can be effectively tackled on individual level by spending more money. (Maybe they cannot.)
Future directions¶
In the future, we would like to increase the time window to get more LAI and FCOVER data. We investigate the possibility to incorporate other datasets like OSM and get official statistics on house prices and/or income, widening the scope of the FUNDUS project, to finally turn it into a full-fledged, environmentally and economically conscious qualitiy-of-life assessment approach. As already mentioned, a particular and potentially very interesting research question arising from the present notebook: can money effectively battle the effects of climate crisis in our direct surroundings? In order to learn more, we shall primarily proceed by expanding the geographical scope of the present notebook, and maybe even considering further economical factors. Here, the scarcity of open data is still a major impediment, but we hope we can contribute to the improvement of the situation with our endeavor.